Abstract: A pipe line for a turbocharger system for an internal combustion engine has at least one exhaust line for the evacuation of exhaust gases from the combustion chamber of the engine to the turbocharger system and at least one inlet line for the supply of air to the combustion chamber. The turbocharger system includes at least one turbine, which cooperates with at least one compressor to extract energy from the exhaust flow of the engine and pressurize the inlet air of the engine. To allow a compact installation with low pressure losses, the inlet line connects with a curved line section of an outlet from the compressor, at least a part-section of the curved line section having a non-circular cross section. A diffuser is placed less than five pipe diameters downstream of the curved line section.

Abstract: A turbocharger unit has a shaft mounting for a rotor shaft. The shaft supports at one end a turbine wheel and at its other end a compressor wheel. The shaft is supported in a bearing housing by two axially spaced bearing elements, one of which forms an axial support via a shoulder on the shaft. A desired exact bearing pre-load is attainable if a discharger ring is mounted on the shaft by a threaded joint in such a way that the ring forms an axial support acting in the opposite axial direction against the other bearing element.